Question

我正在尝试为SqlServer创建基本数据库和登录/用户创建的脚本当我运行我的脚本时，我收到许多错误，如：

必须声明标量变量“@varname”

在脚本执行期间第二次在EXEC语句中使用变量时。

declare
     @dbname nvarchar(50) ,
     @userName nvarchar(50) ,
     @password nvarchar(50);
SET @dbname = N'DBNAME';
SET @userName = N'DBUSERNAME';
SET @password= N'PASSWORD';

Begin transaction
    IF EXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = @dbname)
    BEGIN
        exec ('
            DROP login '+ @userName + '
            DROP USER '+  @userName + '
            alter database '+  @dbname + '
            SET OFFLINE 
            WITH ROLLBACK IMMEDIATE;
            ALTER DATABASE '+  @dbname + '
            SET ONLINE;
            DROP DATABASE '+  @dbname)
    END 

    SET ANSI_NULLS ON
    GO
    SET QUOTED_IDENTIFIER ON
    GO
    SET ANSI_PADDING ON
    GO
    EXEC ('CREATE DATABASE '+ @dbname)
    GO 
    EXEC (@dbname+ '.[dbo].[sp_fulltext_database] @action = ''disable''')
    GO 
    EXEC ('ALTER DATABASE '+ @dbname + ' SET COMPATIBILITY_LEVEL = 100')
    GO 
     ...
    EXEC ('ALTER DATABASE '+ @dbname + ' SET DB_CHAINING OFF')
    GO

    EXEC('create login '+ @userName + 'with password = '+ @password);
    EXEC('use  '+ @dbname+ '
    create user '+ @userName + ' for login '+ @userName);
    EXEC ('EXEC sp_addrolemember  ''db_owner'', '+  @userName)

commit transaction

我是否要为每个查询使用sp_executesql？是否有更短的解决方案？

Answer 1

GO语句告诉查询分析器批处理完成。

http://technet.microsoft.com/en-us/library/ms188037.aspx

因此，在动态代码执行时，设置的声明变量超出范围。

如果您真的想在交易中使用此功能，请在 BEGIN CATCH / END CATCH 中使用 BEGIN TRY / END TRY 进行包装，执行 ROLLBACK < /强>

http://craftydba.com/?p=5930

我从未尝试使用CREATE DATABASE语句。这可能是一个有趣的练习。它是否撤消数据库创建？要添加到我的清单列表中的东西可以尝试。

此外，在组合多个命令时，您需要使用分号（;）。否则，您将收到语法错误。

Answer 2

感谢Raj和Vaibhav Parmar条评论，我更改了我的脚本，现在工作正常。

主要错误是应该删除的GO语句，因为它   用于将SQL命令分组为发送到的批处理   服务器一起。批处理中包含的命令，即集合   自上一个GO命令或会话开始以来的命令，   必须在逻辑上一致。您无法在一个批次中定义变量   因为变量的范围有限，所以在另一个中使用它   到它定义的批次。

第二个错误是我尝试使用transaction with statement   不允许他们的

我将更正后的脚本留在那里作为参考：

SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET ANSI_PADDING ON

declare
     @dbname nvarchar(50) ,
     @userName nvarchar(50) ,
     @password nvarchar(50);
SET @dbname = N'DATABASENAME';
SET @userName = N'DBUSERNAME';
SET @password= N'DBUSERPASSWORD';

IF EXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = @dbname)
BEGIN
    exec ('
    DROP USER '+  @userName + '
    DROP login '+ @userName + '
    alter database '+  @dbname + '
    SET OFFLINE 
    WITH ROLLBACK IMMEDIATE;
    ALTER DATABASE '+  @dbname + '
    SET ONLINE;
    DROP DATABASE '+  @dbname)
END 

EXEC ('CREATE DATABASE '+ @dbname);
EXEC (@dbname+ '.[dbo].[sp_fulltext_database] @action = ''disable''');
EXEC ('ALTER DATABASE '+ @dbname + ' SET COMPATIBILITY_LEVEL = 100');
EXEC ('ALTER DATABASE '+ @dbname + ' SET ANSI_NULL_DEFAULT OFF');
EXEC ('ALTER DATABASE '+ @dbname + ' SET ANSI_NULLS ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET ANSI_PADDING ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET AUTO_CLOSE OFF');
EXEC ('ALTER DATABASE '+ @dbname + ' SET AUTO_SHRINK OFF');
EXEC ('ALTER DATABASE '+ @dbname + ' SET QUOTED_IDENTIFIER ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET RECOVERY FULL');
EXEC ('ALTER DATABASE '+ @dbname + ' SET PAGE_VERIFY CHECKSUM');
EXEC ('ALTER DATABASE '+ @dbname + ' SET ANSI_WARNINGS ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET ARITHABORT ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET AUTO_CREATE_STATISTICS ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET AUTO_UPDATE_STATISTICS ON');
EXEC ('ALTER DATABASE '+ @dbname + ' SET CURSOR_CLOSE_ON_COMMIT OFF');
EXEC ('ALTER DATABASE '+ @dbname + ' SET CURSOR_DEFAULT  GLOBAL');
EXEC ('ALTER DATABASE '+ @dbname + ' SET CONCAT_NULL_YIELDS_NULL OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET NUMERIC_ROUNDABORT OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET RECURSIVE_TRIGGERS OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET  ENABLE_BROKER'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET AUTO_UPDATE_STATISTICS_ASYNC OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET DATE_CORRELATION_OPTIMIZATION OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET TRUSTWORTHY OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET ALLOW_SNAPSHOT_ISOLATION OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET PARAMETERIZATION SIMPLE'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET READ_COMMITTED_SNAPSHOT OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET HONOR_BROKER_PRIORITY OFF'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET  READ_WRITE'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET  MULTI_USER'); 
EXEC ('ALTER DATABASE '+ @dbname + ' SET DB_CHAINING OFF');

EXEC ('create login '+  @userName + ' with password = '''+ @password+ ''', default_database = ' + @dbname);
EXEC ('use  '+ @dbname+ ' create user '+ @userName + ' for login '+ @userName);
EXEC ('use  '+ @dbname+ ' EXEC sp_addrolemember  ''db_owner'', '+  @userName);

Answer 3

使用下面的代码可能会有所帮助：

declare @dbname nvarchar(50) ,@userName nvarchar(50) ,@password nvarchar(50);
SET @dbname = N'DBNAME';
SET @userName = N'DBUSERNAME';
SET @password= N'PASSWORD';

Begin transaction
IF EXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = @dbname)
BEGIN
    exec ('
        DROP login '+ @userName + '
        DROP USER '+  @userName + '
        alter database '+  @dbname + '
        SET OFFLINE 
        WITH ROLLBACK IMMEDIATE;
        ALTER DATABASE '+  @dbname + '
        SET ONLINE;
        DROP DATABASE '+  @dbname)
END 
   else
   begin
--SET ANSI_NULLS ON
--GO
SET QUOTED_IDENTIFIER ON
--GO
--SET ANSI_PADDING ON
--GO
EXEC ('CREATE DATABASE '+ @dbname)
--GO 
EXEC (@dbname+ '.[dbo].[sp_fulltext_database] @action = ''disable''')
--GO 
EXEC ('ALTER DATABASE '+ @dbname + ' SET COMPATIBILITY_LEVEL = 100')
--GO 

EXEC ('ALTER DATABASE '+ @dbname + ' SET DB_CHAINING OFF')
--GO

EXEC('create login '+ @userName + 'with password = '+ @password);
EXEC('use  '+ @dbname+ '
create user '+ @userName + ' for login '+ @userName);
EXEC ('EXEC sp_addrolemember  ''db_owner'', '+  @userName)
end

commit transaction

必须在数据库创建脚本中声明标量变量“@varname”

3 个答案: